помогите с запуском сервера

    const http = require('http')
    const EventEmitter = require('events')
    const PORT = process.env.PORT || 5000
    const emitter = new EventEmitter()
    class Router {
    constructor(){
    this.endpoints ={} 
   }
        request(method = 'GET',path,handler){
      if(!this.endpoints[path]){
        this.endpoints[path]= {}
      }
      const endpoint = this.endpoints[path];
      if(endpoint[method]){
          throw new Error(`[${method}] по адресу ${path} уже существует`)
       }
       endpoint[method] = handler;
      emitter.on('[${path}]:[${method}]', (req,res) =>{
      })

}
get(path,handler){
    this.request('GET',path,handler)
}
post(path,handler){
    this.request('POST',path,handler)
}
put(path,handler){
    this.request('PUT',path,handler)
}
delete(path,handler){
    this.request('DELETE',path,handler)
}
                   }
                    const router = new Router()
                router.get('/users',(req,res) =>{
                res.end('YOU SEND REQUEST TO USERS')
                           })
                 router.get('/posts',(req,res) =>{
                        res.end('YOU SEND REQUEST TO POSTS')
       })


  const server = http.createServer( (req,res)=> {
                        emitter.emit('[${req.url}]:[${req.method}]', req, res)
            
                    // res.end(req.url)
                })

                server.listen(5000, ()=> {
                 console.log('ITS OK ${PORT)')
  
  })

Помогите найти ошибку в коде.